Patent · US Active

Maintaining point of presence at access switch for roaming clients in distributed wireless controller system

US8446876B2 · kind B2 · utility

3Cited by

8References

16Claims

0Family size

Assignee

Cisco Technology, Inc. · US

Inventors

Patrice R. Calhoun · Pleasanton, US
Abhijit Choudhury · Cupertino, US
Rohit Suri · Fremont, US
Sudhir Kumar Jain · Milpitas, US
Bhanu Gopalasetty · San Jose, US
Navindra Yadav · San Jose, US
Fusun Ertemalp · Menlo Park, US
Kent K. Leung · Palo Alto, US

Key dates

Filing date	May 4, 2010
Grant date	May 21, 2013
Priority date	—
Expiry date	Apr 15, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH04W8/087
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Techniques are provided to enable support of roaming wireless devices in a network such that the wireless devices can keep their Internet Protocol (IP) addresses as they roam across mobility sub-domains. Traffic for a wireless device that roams is tunneled back to the access switch that serves the IP subnet which includes an IP address for the wireless device. Traffic is tunneled back to that access switch for the wireless device when the wireless device roams to another access switch which does not serve the IP subnet for the wireless device in the same mobility sub-domain and when the wireless device roams to a different mobility sub-domain, in which case the traffic is tunneled between tunneling endpoints in the respective mobility sub-domains.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.